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High Energy Physics - Lattice

Title:
MC simulations of $O(2)φ^4$ theory in three dimensions with worm algorithm

Abstract: We study the critical region of the $O(2)\,\phi^4$ theory by means of Monte
Carlo simulations on the lattice. In particular we determine the ratio
$\Delta\langle\phi^2\rangle_c/g$ in order to estimate the first correction to
the critical temperature of a weak interacting Bose gas.